CN104649355A - Air flotation-magnetic separation treatment system of oil-containing wastewater - Google Patents
Air flotation-magnetic separation treatment system of oil-containing wastewater Download PDFInfo
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- CN104649355A CN104649355A CN201410754411.XA CN201410754411A CN104649355A CN 104649355 A CN104649355 A CN 104649355A CN 201410754411 A CN201410754411 A CN 201410754411A CN 104649355 A CN104649355 A CN 104649355A
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- treatment
- magnetic
- air
- oil
- air supporting
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- 239000002351 wastewater Substances 0.000 title claims abstract description 17
- 238000007885 magnetic separation Methods 0.000 title abstract 4
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000005189 flocculation Methods 0.000 claims abstract description 11
- 230000016615 flocculation Effects 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000007667 floating Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 3
- 238000009300 dissolved air flotation Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005188 flotation Methods 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 21
- 239000007764 o/w emulsion Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000006249 magnetic particle Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Physical Water Treatments (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides an air flotation-magnetic separation treatment system of oil-containing wastewater and belongs to the field of oilfield wastewater treatment. For solving the problems of the existing treatment methods, namely insufficient treatment effect, or requirement on much equipment and complex treatment steps, an oilfield wastewater treatment system short in treatment process, short in time, small in floor area and high in treatment effect is provided. The system comprises a flocculation air-flotation tank, a magnetic separation device and a filter device, which are orderly connected with each other; in the air flotation process, the dosage of a flocculant PA is 45-55mg/L; in the magnetic separation process, the dosage of PAC is 20-25mg/L; the magnetic seed is Fe3O4 and the dosage of the magnetic seed is 100mg/L; under the condition that the magnetic field intensity is 40mT, the wastewater is firstly stirred for 2 minutes at a rotating speed of 150r/min and then stirred for 5 minutes at a rotating speed of 50r/min, and then the treated wastewater is fed into the filter device for filtration. The treatment system is short in treatment time, small in floor area and stable in treatment effect.
Description
Technical field
The invention belongs to oil field wastewater treatment field.
Background technology
In recent years, work that Sinopec is actively pushed forward " water-saving and emission-reducing ", obtains remarkable effect.Wherein waste water recycling is with being advance one of " water-saving and emission-reducing " important channel of working.The oleaginousness of petrochemical wastewater is higher, and the existence form of oils in waste water is oil slick, dispersed oil, oil in water emulsion and dissolving oil.The removal of current oil slick mainly adopts gravitational separation process, and conventional equipment is oil trap; The removal of dispersed oil adopts filtration method or By Bubble-floating Method usually; The minimizing technology of oil in water emulsion mainly contains By Bubble-floating Method, flocculence, electrochemical process, coalescence and membrane separation process; The minimizing technology of dissolving oil mainly contains ox thing method, absorption method, membrane separation process, advanced oxidation processes, sonic approach, supersonic method and microwave method etc., but be not treatment effect is not exactly thoroughly need equipment many and complicated process steps.
Summary of the invention
The object of this invention is to provide a kind for the treatment of scheme few, the time is short, the oil field wastewater treatment system that floor space is little.
The present invention is achieved by the following technical programs: a kind of air supporting-Magneto separate process oily(waste)water system, comprise the flocculation-air floating tank, magnetic separating device and the filtration unit that are connected successively, in waste water, flocculation agent PAC is added in air supporting process, add-on is 45 ~ 55mg/L, carry out dissolved air flotation, Magneto separate process for add flocculation agent and magnetic kind in processed waste water, and magnetic kind is Fe
3o
4magnetic kind add-on is 100mg/L, flocculation agent PAC add-on is 20 ~ 25mg/L, and Magneto separate for stir under magneticstrength is 40mT condition, and agitation condition is first stir 2min with the rotating speed of 150r/min, stir 5min with the rotating speed of 50r/min again, processed waste water enters filtration unit and filters.
In air supporting process, air supporting mixing speed 200 ~ 250r/min, air supporting 112 ~ 18min dead time, dissolved-air pressure 0.35 ~ 0.4MPa, floatation reflux is than 20% ~ 25%.
The present invention has following beneficial effect:
Treatment system of the present invention, oil removal rate is high, and deoiling effect is remarkable, stable, and floor space is little.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
Specific embodiment: treatment system of the present invention increases magnetic separating device after traditional air supporting process, a small amount of flocculation agent, magnetic-particle are mixed with oily waste water aqueous phase, using magnetic-particle as carrier, oil is made to be adsorbed on magnetic-particle, be separated from water by the oil of magnetic separating device by magnetic substance and absorption thereof again, thus reach the object of oily water separation, there is efficient, energy-conservation, province ground, magnetic kind recovery utilization rate advantages of higher.
Its composition comprises the flocculation-air floating tank, magnetic separating device and the filtration unit that are connected successively, in waste water, flocculation agent PAC is added in air supporting process, add-on is 45 ~ 55mg/L, carry out dissolved air flotation, in air supporting process, air supporting mixing speed 200 ~ 250r/min, air supporting 112 ~ 18min dead time, dissolved-air pressure 0.35 ~ 0.4MPa, floatation reflux is than 20% ~ 25%;
Magneto separate process for add flocculation agent and magnetic kind in processed waste water, and magnetic kind is Fe
3o
4magnetic kind add-on is 100mg/L, flocculation agent PAC add-on is 20 ~ 25mg/L, Magneto separate for stir under magneticstrength is 40mT condition, agitation condition is first stir 2min with the rotating speed of 150r/min, then stirs 5min with the rotating speed of 50r/min, and processed waste water enters filtration unit and filters.
In the present invention, air flotation cell is mainly used in removing dispersed oil and part oil in water emulsion as pre-treatment, and Magneto separate unit is removed oil in water emulsion as advanced treatment and is partly dissolved oil.
The treatment system treatment time of the present invention is short, and treatment effect is stablized, when intaking oil quality concentration average out to 29.5mg/L, and air flotation cell water outlet oil quality concentration average out to 8.5mg/L, oil removal rate average out to 71.1%; Magneto separate unit water outlet oil quality concentration average out to 4.7mg/L, oil removal rate average out to 44.1%; Total oil removal rate average out to 83.8%.
Above content is the further description done the present invention in conjunction with concrete embodiment, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (2)
1. air supporting-Magneto separate process oily(waste)water system, it is characterized in that: comprise the flocculation-air floating tank, magnetic separating device and the filtration unit that are connected successively, in waste water, flocculation agent PAC is added in air supporting process, add-on is 45 ~ 55mg/L, carry out dissolved air flotation, Magneto separate process for add flocculation agent and magnetic kind in processed waste water, and magnetic kind is Fe
3o
4magnetic kind add-on is 100mg/L, flocculation agent PAC add-on is 20 ~ 25mg/L, and Magneto separate for stir under magneticstrength is 40mT condition, and agitation condition is first stir 2min with the rotating speed of 150r/min, stir 5min with the rotating speed of 50r/min again, processed waste water enters filtration unit and filters.
2. air supporting-Magneto separate process oily(waste)water system as claimed in claim 1, it is characterized in that: in air supporting process, air supporting mixing speed 200 ~ 250r/min, air supporting 112 ~ 18min dead time, dissolved-air pressure 0.35 ~ 0.4MPa, floatation reflux is than 20% ~ 25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410754411.XA CN104649355A (en) | 2014-12-11 | 2014-12-11 | Air flotation-magnetic separation treatment system of oil-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410754411.XA CN104649355A (en) | 2014-12-11 | 2014-12-11 | Air flotation-magnetic separation treatment system of oil-containing wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104649355A true CN104649355A (en) | 2015-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410754411.XA Pending CN104649355A (en) | 2014-12-11 | 2014-12-11 | Air flotation-magnetic separation treatment system of oil-containing wastewater |
Country Status (1)
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| CN (1) | CN104649355A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105819612A (en) * | 2016-03-18 | 2016-08-03 | 安徽清环水工科技有限公司 | Hackle drum type magnetic separation water treatment facility |
| CN109354139A (en) * | 2018-09-26 | 2019-02-19 | 同济大学 | A method for rapidly treating mechanically processed waste emulsion by utilizing magnetic particles |
| CN110902933A (en) * | 2019-12-24 | 2020-03-24 | 北航（四川）西部国际创新港科技有限公司 | Wastewater treatment method and wastewater treatment system |
-
2014
- 2014-12-11 CN CN201410754411.XA patent/CN104649355A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105819612A (en) * | 2016-03-18 | 2016-08-03 | 安徽清环水工科技有限公司 | Hackle drum type magnetic separation water treatment facility |
| CN109354139A (en) * | 2018-09-26 | 2019-02-19 | 同济大学 | A method for rapidly treating mechanically processed waste emulsion by utilizing magnetic particles |
| CN110902933A (en) * | 2019-12-24 | 2020-03-24 | 北航（四川）西部国际创新港科技有限公司 | Wastewater treatment method and wastewater treatment system |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
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Application publication date: 20150527 |